Here is an older similar thread which got some good answers: Is growth a necessity in capitalist economies?
If it comes up in a debate, first thing to ask is how they’re defining growth. If they’re claiming that growth is somehow a necessity under capitalism, the burden of proof is on them to say why. And empirical evidence is of no use to them here; this is economics. (And certainly evidence from the past 100 years is irrelevant, because in the past 100 years we have not had capitalism.)